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Message-ID: <Y5XG0uHwz3om0gLA@lunn.ch>
Date: Sun, 11 Dec 2022 13:02:26 +0100
From: Andrew Lunn <andrew@...n.ch>
To: "mengyuanlou@...-swift.com" <mengyuanlou@...-swift.com>
Cc: netdev@...r.kernel.org, jiawenwu@...stnetic.com
Subject: Re: [PATCH net-next v2] net: ngbe: Add ngbe mdio bus driver.
> > If you don't have the I2C bus, i'm wondering how you can actually
> > driver the SFP and the MAC. You have no idea what has been
> > inserted. Is it actually an SFF, not an SFP? Do you have any of the
> > GPIOs normally associated with an SFP? TX_DISABLE, LOS, TX_FAULT?
> >
> 1、Yeah. We can't know what module is inserted
That is a very odd design. You are going to get all sorts of reports
of it being broken when some random module is interested.
If it was my design, i would not use an SFP socket. I would solder
down an SFF. They should be pin compatible. You then know exactly what
you have, and how the MAC needs to be configured.
Andrew
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